<template>
	<div class="wrapper">
	  <!-- header部分 -->
	  <header>
		<p>商家列表</p>
	  </header>
  
	  <!-- 商家列表部分 -->
	  <ul class="business">
		<li v-for="item in businessArr" :key="item.businessId" @click="toBusinessInfo(item.businessId)">
		  <div class="business-img">
			<img :src="item.businessImg" />
			<div class="business-img-quantity" v-show="item.quantity > 0">{{ item.quantity }}</div>
		  </div>
		  <div class="business-info">
			<h3>{{ item.businessName }}</h3>
			<p>&#165;{{ item.starPrice }}起送 | &#165;{{ item.deliveryPrice }}配送</p>
			<p>{{ item.businessExplain }}</p>
		  </div>
		</li>
	  </ul>
  
	  <ul class="block">
		<p>&nbsp;</p>
	  </ul>
  
	  <!-- 底部菜单部分 -->
	  <Footer />
	</div>
  </template>
  
  <script setup>
  import { ref, onMounted } from 'vue';
  import { useRoute, useRouter } from 'vue-router';
  import axios from 'axios';
  import Footer from '../components/Footer.vue';

  const route = useRoute();
  const router = useRouter();
  const orderTypeId = ref(route.query.orderTypeId);
  const businessArr = ref([]);
  const user = ref({});
  

  const getSessionStorage = (key) => {
	return JSON.parse(sessionStorage.getItem(key));
  };

  onMounted(async () => {
	user.value = getSessionStorage('user');
  
	try {
	  const response = await axios.get(`/Business/orderTypeId/${orderTypeId.value}`);
	  businessArr.value = response.data;
  
	  if (user.value) {
		listCart();
	  }
	} catch (error) {
	  console.error(error);
	}
  });
  
  const listCart = async () => {
	try {
	  const response = await axios.get('/Cart', {
		params: {
		  userId: user.value.userId
		}
	  });
  
	  let cartArr = response.data;
	  for (let businessItem of businessArr.value) {
		businessItem.quantity = 0;
		for (let cartItem of cartArr) {
		  if (cartItem.businessId === businessItem.businessId) {
			businessItem.quantity += cartItem.quantity;
		  }
		}
	  }
  
	  businessArr.value.sort();
	} catch (error) {
	  console.error(error);
	}
  };
  
  const toBusinessInfo = (businessId) => {
	router.push({ path: '/businessInfo', query: { businessId: businessId } });
  };
  </script>
  
  <style scoped>
  /****************** 总容器 ******************/
  .wrapper {
	width: 100%;
	height: 100%;
  }
  
  /****************** header部分 ******************/
  .wrapper header {
	width: 100%;
	height: 12vw;
	background-color: #0097FF;
	color: #fff;
	font-size: 4.8vw;
	position: fixed;
	left: 0;
	top: 0;
	z-index: 1000;
	display: flex;
	justify-content: center;
	align-items: center;
  }
  
  /****************** 商家列表部分 ******************/
  .wrapper .business {
	width: 100%;
	margin-top: 12vw;
	margin-bottom: 14vw;
  }
  
  .wrapper .business li {
	width: 100%;
	box-sizing: border-box;
	padding: 2.5vw;
	border-bottom: solid 1px #DDD;
	user-select: none;
	cursor: pointer;
	display: flex;
	align-items: center;
  }
  
  .wrapper .business li .business-img {
	position: relative;
  }
  
  .wrapper .business li .business-img img {
	width: 20vw;
	height: 20vw;
  }
  
  .wrapper .business li .business-img .business-img-quantity {
	width: 5vw;
	height: 5vw;
	background-color: red;
	color: #fff;
	font-size: 3.6vw;
	border-radius: 2.5vw;
	display: flex;
	justify-content: center;
	align-items: center;
	position: absolute;
	right: -1.5vw;
	top: -1.5vw;
  }
  
  .wrapper .business li .business-info {
	margin-left: 3vw;
  }
  
  .wrapper .business li .business-info h3 {
	font-size: 3.8vw;
	color: #555;
  }
  
  .wrapper .business li .business-info p {
	font-size: 3vw;
	color: #888;
	margin-top: 2vw;
  }
  
  .wrapper .block {
	padding-bottom: 10vw;
  }
  </style>
  